DSP controllers for three-phase unity-power-factor rectifiers
This chapter starts with an overview of the available digital signal processor (DSP) boards suitable for power converters control, indicating the main features for each case, such as analogue to digital conversion, communication channels, timers, PWM outputs, interruptions, among others. The second topic of this chapter consists in a review of the main topologies used for three-phase unity-power-factor (UPF) rectifiers, where classic six-switches topologies will be presented (Voltage and Current Source Converters), as well as novel configurations as Y- or Δ-switch rectifiers and VIENNA rectifier. As a third subject, the implementation of PhaseLocked Loop (PLL) algorithms will be analyzed in this chapter, remarking the importance of this stage to achieve the UPF operation of the rectifiers. The presented PLL algorithms will be classified as Fixed or Varying Sampling Time implementation. Finally, a couple of control algorithms will be shown, with special emphasis on dq frame-based controllers, p-q theory-based controllers and predictive control. The focus in this last part will lie in how to cope with some practical issues in the implementation of the aforementioned control strategies.
DSP controllers for three-phase unity-power-factor rectifiers, Page 1 of 2
< Previous page Next page > /docserver/preview/fulltext/books/po/pbpo072e/PBPO072E_ch7-1.gif /docserver/preview/fulltext/books/po/pbpo072e/PBPO072E_ch7-2.gif